| Characteristic | Values | Year of First LPN Licensure | ORa | AIC+ Score |
| age at first LPN licensure (years) | 16 - 27 or missing | 1938-1981 | 6.50 | 0.76954 |
| 28 - 68 | - | |||
| 16 - 27 or missing | 1982-1995 | 39.8 | ||
| 28 - 34 | 23.4 | |||
| 35 - 68 | 8.94 | |||
| 16 - 34 or missing | 1996-2004 | 97.0 | ||
| 35 - 68 | 63.5 | |||
| 16 - 27 or missing | 2005-2013 or missing | 50.3 | ||
| 28 - 68 | 35.6 | |||
| highest nursing degree in last year as an LPN | - | 1938-1981 | - | 0.76905 |
| - | 1982-1995 | 5.44 | ||
| diploma or associate degree | 1996-2004 | 27.5 | ||
| baccalaureate, master or doctorate in nursing or missing | 14.1 | |||
| diploma or associate degree | 2005-2013 or missing | 5.73 | ||
| baccalaureate, master or doctorate in nursing or missing | 10.4 | |||
| work setting in last year as an LPN | - | 1938-1981 | - | 0.77028 |
| - | 1982-1995 | 5.44 | ||
| hospital in-patient or missing | 1996-2004 | 33.5 | ||
| long-term care or solo/group practice or hospital out-patient or other | 12.1 | |||
| - | 2005-2013 or missing | 8.55 | ||
| specialty in last year as an LPN | - | 1938-1981 | - | 0.76903 |
| - | 1982-1995 | 5.44 | ||
| community-based practice or geriatrics, pediatrics, or other | 1996-2004 | 13.8 | ||
| medical/surgical or missing | 31.3 | |||
| - | 2005-2013 or missing | 8.55 | ||
| employed full time in last year as an LPN | - | 1938-1981 | - | 0.76840 |
| - | 1982-1995 | 5.44 | ||
| yes | 1996-2004 | 14.0 | ||
| no or missing | 27.0 |